Exam-style question
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Which of the following statements correctly describes the coefficient of performance (COP) for refrigerators?.
- A.COP = Qc / W
- B.COP = W / Qc
- C.COP = Qh / W
- D.COP = W / Qh
Model answer
What a good answer should say
- COP = Qc / W
Explanation
Why this works
For refrigerators, the coefficient of performance (COP) is defined as the ratio of the heat removed from the cold reservoir (Qc) to the work input (W). This reflects the efficiency of the refrigerator in removing heat.
Common mistake
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